User blog comment:Hayds126/New evolutions. (Part 3)/@comment-31267872-20180228232226

How about a baby Tauros/Miltank? It can only be obtained by breeding Tauros and Miltank, and a little brownish-pink cow comes out of it. If it is male, it will evolve into Tauros at Level 30. If it is female, it will evolve into Miltank at Level 30. (Of course, it's a pre-evolution.)

If you breed Miltank with some other Pokémon, you'll still get a baby Miltank. It must be Miltank and Tauros.

(I didn't say Bouffalant being an evolved form of Tauros, because Bouffalant can be both genders.)